Should Trailer Tires Be Inflated to Their Max Psi Rating When Cold

Updated 03/19/2014 | Published 03/18/2014

Question:

I plan to purchase a set of Loadstat ST185/80 13 load range D. I have read that they should be inflated to the max 65 psi, I have heard that the tire pressure will increase while driving, if this is true can the tire withstand an increase in psi over the maximum ? Thank you.

asked by: John P

Helpful Expert Reply:

Trailer tires are designed to be inflated to their max psi when they are cold and can handle the increased pressure that comes when they heat up from driving. The only real way they will get too hot and fail is if you exceed the speed rating for the tire.

Special trailer tires are usually rated to operate at a maximum speed of 65 mph. If you exceed 65 mph, heat could build up in the tire and cause it to break down and fail. If a tire is rated to run at a higher speed, this information should be listed on the trailer's sidewall.

I attached an FAQ article on trailer tires for you to check out also.

expert reply by: Jameson C